397718 has 4 divisors (see below), whose sum is σ = 596580. Its totient is φ = 198858.

The previous prime is 397697. The next prime is 397721. The reversal of 397718 is 817793.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99428 + ... + 99431.

It is an arithmetic number, because the mean of its divisors is an integer number (149145).

2³⁹⁷⁷¹⁸ is an apocalyptic number.

397718 is a deficient number, since it is larger than the sum of its proper divisors (198862).

397718 is a wasteful number, since it uses less digits than its factorization.

397718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198861.

The product of its digits is 10584, while the sum is 35.

The square root of 397718 is about 630.6488721943. The cubic root of 397718 is about 73.5402466732.

The spelling of 397718 in words is "three hundred ninety-seven thousand, seven hundred eighteen".